Abstract: Lithium secondary batteries are disclosed. In an embodiment, a lithium secondary battery includes an anode including an anode active material that includes carbon-based active material particles including carbon, the carbon-based active material particles having a Brunauer-Emmett-Teller (BET) specific surface area of 3.0 m2/g to 5.0 m2/g and an average particle diameter (D50) of 5?m to 7.5 ?m, a cathode facing the anode, and a non-aqueous electrolyte solution including a non-aqueous organic solvent that includes a propionate-based organic solvent including propionate and a lithium salt. A content of the propionate-based organic solvent relative to a total volume of the non-aqueous organic solvent is 55 vol % or more.

Abstract: A booth module for exhibition includes: a frame; a main body dowel; a bolt detachably coupled to the main body dowel; and a cap dowel detachably coupled to the bolt, wherein the main body dowel has: a body having a bolt insertion hole formed therein; a button of which a part is inserted and installed in the body through a button installation hole formed in the body; and a spring installed inside the body and pushing one end of the button, and wherein the cap dowel has: a body having a bolt insertion hole formed therein; a button of which a part is inserted and installed in the body through a button installation hole formed in the body; and a spring installed inside the body and pushing one end of the button, wherein the buttons are provided with bolt through holes communicating with the bolt insertion holes.

Abstract: A booth module for exhibition includes: a frame; a main body dowel; a bolt detachably coupled to the main body dowel; and a cap dowel detachably coupled to the bolt, wherein the main body dowel has: a body having a bolt insertion hole formed therein; a button of which a part is inserted and installed in the body through a button installation hole formed in the body; and a spring installed inside the body and pushing one end of the button, and wherein the cap dowel has: a body having a bolt insertion hole formed therein; a button of which a part is inserted and installed in the body through a button installation hole formed in the body; and a spring installed inside the body and pushing one end of the button, wherein the buttons are provided with bolt through holes communicating with the bolt insertion holes.